1313130321 has 12 divisors (see below), whose sum is σ = 1937100672. Its totient is φ = 856793976.

The previous prime is 1313130319. The next prime is 1313130323. The reversal of 1313130321 is 1230313131.

It is a happy number.

1313130321 is a `hidden beast` number, since 1 + 31 + 313 + 0 + 321 = 666.

It is an interprime number because it is at equal distance from previous prime (1313130319) and next prime (1313130323).

It is not a de Polignac number, because 1313130321 - 2¹ = 1313130319 is a prime.

It is a super-2 number, since 2×1313130321² = 3448622479859126082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1313130294 and 1313130303.

It is not an unprimeable number, because it can be changed into a prime (1313130323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1551741 + ... + 1552586.

It is an arithmetic number, because the mean of its divisors is an integer number (161425056).

Almost surely, 2^1313130321 is an apocalyptic number.

It is an amenable number.

1313130321 is a deficient number, since it is larger than the sum of its proper divisors (623970351).

1313130321 is a wasteful number, since it uses less digits than its factorization.

1313130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104380 (or 3104377 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1313130321 is about 36237.1400775503. The cubic root of 1313130321 is about 1095.0550269463.

Adding to 1313130321 its reverse (1230313131), we get a palindrome (2543443452).

The spelling of 1313130321 in words is "one billion, three hundred thirteen million, one hundred thirty thousand, three hundred twenty-one".